From 2dd7d29c783db1efa875e585770feb2cd7aaaf32 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Wed, 7 Sep 2011 06:04:30 -0300 Subject: [media] mt9m001: convert to the control framework Signed-off-by: Hans Verkuil [g.liakhovetski@gmx.de: simplified pointer arithmetic] Signed-off-by: Guennadi Liakhovetski Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/mt9m001.c | 218 +++++++++++++++--------------------------- 1 file changed, 77 insertions(+), 141 deletions(-) (limited to 'drivers/media') diff --git a/drivers/media/video/mt9m001.c b/drivers/media/video/mt9m001.c index 3555e853e5c9..42bb3c89cfe6 100644 --- a/drivers/media/video/mt9m001.c +++ b/drivers/media/video/mt9m001.c @@ -17,6 +17,7 @@ #include #include #include +#include /* * mt9m001 i2c address 0x5d @@ -85,15 +86,19 @@ static const struct mt9m001_datafmt mt9m001_monochrome_fmts[] = { struct mt9m001 { struct v4l2_subdev subdev; + struct v4l2_ctrl_handler hdl; + struct { + /* exposure/auto-exposure cluster */ + struct v4l2_ctrl *autoexposure; + struct v4l2_ctrl *exposure; + }; struct v4l2_rect rect; /* Sensor window */ const struct mt9m001_datafmt *fmt; const struct mt9m001_datafmt *fmts; int num_fmts; int model; /* V4L2_IDENT_MT9M001* codes from v4l2-chip-ident.h */ - unsigned int gain; - unsigned int exposure; + unsigned int total_h; unsigned short y_skip_top; /* Lines to skip at the top */ - unsigned char autoexposure; }; static struct mt9m001 *to_mt9m001(const struct i2c_client *client) @@ -171,10 +176,8 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) struct i2c_client *client = v4l2_get_subdevdata(sd); struct mt9m001 *mt9m001 = to_mt9m001(client); struct v4l2_rect rect = a->c; - struct soc_camera_device *icd = client->dev.platform_data; int ret; const u16 hblank = 9, vblank = 25; - unsigned int total_h; if (mt9m001->fmts == mt9m001_colour_fmts) /* @@ -193,7 +196,7 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) soc_camera_limit_side(&rect.top, &rect.height, MT9M001_ROW_SKIP, MT9M001_MIN_HEIGHT, MT9M001_MAX_HEIGHT); - total_h = rect.height + mt9m001->y_skip_top + vblank; + mt9m001->total_h = rect.height + mt9m001->y_skip_top + vblank; /* Blanking and start values - default... */ ret = reg_write(client, MT9M001_HORIZONTAL_BLANKING, hblank); @@ -213,17 +216,8 @@ static int mt9m001_s_crop(struct v4l2_subdev *sd, struct v4l2_crop *a) if (!ret) ret = reg_write(client, MT9M001_WINDOW_HEIGHT, rect.height + mt9m001->y_skip_top - 1); - if (!ret && mt9m001->autoexposure) { - ret = reg_write(client, MT9M001_SHUTTER_WIDTH, total_h); - if (!ret) { - const struct v4l2_queryctrl *qctrl = - soc_camera_find_qctrl(icd->ops, - V4L2_CID_EXPOSURE); - mt9m001->exposure = (524 + (total_h - 1) * - (qctrl->maximum - qctrl->minimum)) / - 1048 + qctrl->minimum; - } - } + if (!ret && v4l2_ctrl_g_ctrl(mt9m001->autoexposure) == V4L2_EXPOSURE_AUTO) + ret = reg_write(client, MT9M001_SHUTTER_WIDTH, mt9m001->total_h); if (!ret) mt9m001->rect = rect; @@ -383,105 +377,48 @@ static int mt9m001_s_register(struct v4l2_subdev *sd, } #endif -static const struct v4l2_queryctrl mt9m001_controls[] = { - { - .id = V4L2_CID_VFLIP, - .type = V4L2_CTRL_TYPE_BOOLEAN, - .name = "Flip Vertically", - .minimum = 0, - .maximum = 1, - .step = 1, - .default_value = 0, - }, { - .id = V4L2_CID_GAIN, - .type = V4L2_CTRL_TYPE_INTEGER, - .name = "Gain", - .minimum = 0, - .maximum = 127, - .step = 1, - .default_value = 64, - .flags = V4L2_CTRL_FLAG_SLIDER, - }, { - .id = V4L2_CID_EXPOSURE, - .type = V4L2_CTRL_TYPE_INTEGER, - .name = "Exposure", - .minimum = 1, - .maximum = 255, - .step = 1, - .default_value = 255, - .flags = V4L2_CTRL_FLAG_SLIDER, - }, { - .id = V4L2_CID_EXPOSURE_AUTO, - .type = V4L2_CTRL_TYPE_BOOLEAN, - .name = "Automatic Exposure", - .minimum = 0, - .maximum = 1, - .step = 1, - .default_value = 1, - } -}; - -static struct soc_camera_ops mt9m001_ops = { - .controls = mt9m001_controls, - .num_controls = ARRAY_SIZE(mt9m001_controls), -}; - -static int mt9m001_g_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) +static int mt9m001_g_volatile_ctrl(struct v4l2_ctrl *ctrl) { - struct i2c_client *client = v4l2_get_subdevdata(sd); - struct mt9m001 *mt9m001 = to_mt9m001(client); - int data; + struct mt9m001 *mt9m001 = container_of(ctrl->handler, + struct mt9m001, hdl); + s32 min, max; switch (ctrl->id) { - case V4L2_CID_VFLIP: - data = reg_read(client, MT9M001_READ_OPTIONS2); - if (data < 0) - return -EIO; - ctrl->value = !!(data & 0x8000); - break; case V4L2_CID_EXPOSURE_AUTO: - ctrl->value = mt9m001->autoexposure; - break; - case V4L2_CID_GAIN: - ctrl->value = mt9m001->gain; - break; - case V4L2_CID_EXPOSURE: - ctrl->value = mt9m001->exposure; + min = mt9m001->exposure->minimum; + max = mt9m001->exposure->maximum; + mt9m001->exposure->val = + (524 + (mt9m001->total_h - 1) * (max - min)) / 1048 + min; break; } return 0; } -static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) +static int mt9m001_s_ctrl(struct v4l2_ctrl *ctrl) { + struct mt9m001 *mt9m001 = container_of(ctrl->handler, + struct mt9m001, hdl); + struct v4l2_subdev *sd = &mt9m001->subdev; struct i2c_client *client = v4l2_get_subdevdata(sd); - struct mt9m001 *mt9m001 = to_mt9m001(client); - struct soc_camera_device *icd = client->dev.platform_data; - const struct v4l2_queryctrl *qctrl; + struct v4l2_ctrl *exp = mt9m001->exposure; int data; - qctrl = soc_camera_find_qctrl(&mt9m001_ops, ctrl->id); - - if (!qctrl) - return -EINVAL; - switch (ctrl->id) { case V4L2_CID_VFLIP: - if (ctrl->value) + if (ctrl->val) data = reg_set(client, MT9M001_READ_OPTIONS2, 0x8000); else data = reg_clear(client, MT9M001_READ_OPTIONS2, 0x8000); if (data < 0) return -EIO; - break; + return 0; + case V4L2_CID_GAIN: - if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) - return -EINVAL; /* See Datasheet Table 7, Gain settings. */ - if (ctrl->value <= qctrl->default_value) { + if (ctrl->val <= ctrl->default_value) { /* Pack it into 0..1 step 0.125, register values 0..8 */ - unsigned long range = qctrl->default_value - qctrl->minimum; - data = ((ctrl->value - qctrl->minimum) * 8 + range / 2) / range; + unsigned long range = ctrl->default_value - ctrl->minimum; + data = ((ctrl->val - ctrl->minimum) * 8 + range / 2) / range; dev_dbg(&client->dev, "Setting gain %d\n", data); data = reg_write(client, MT9M001_GLOBAL_GAIN, data); @@ -490,8 +427,8 @@ static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) } else { /* Pack it into 1.125..15 variable step, register values 9..67 */ /* We assume qctrl->maximum - qctrl->default_value - 1 > 0 */ - unsigned long range = qctrl->maximum - qctrl->default_value - 1; - unsigned long gain = ((ctrl->value - qctrl->default_value - 1) * + unsigned long range = ctrl->maximum - ctrl->default_value - 1; + unsigned long gain = ((ctrl->val - ctrl->default_value - 1) * 111 + range / 2) / range + 9; if (gain <= 32) @@ -507,47 +444,30 @@ static int mt9m001_s_ctrl(struct v4l2_subdev *sd, struct v4l2_control *ctrl) if (data < 0) return -EIO; } + return 0; - /* Success */ - mt9m001->gain = ctrl->value; - break; - case V4L2_CID_EXPOSURE: - /* mt9m001 has maximum == default */ - if (ctrl->value > qctrl->maximum || ctrl->value < qctrl->minimum) - return -EINVAL; - else { - unsigned long range = qctrl->maximum - qctrl->minimum; - unsigned long shutter = ((ctrl->value - qctrl->minimum) * 1048 + + case V4L2_CID_EXPOSURE_AUTO: + if (ctrl->val == V4L2_EXPOSURE_MANUAL) { + unsigned long range = exp->maximum - exp->minimum; + unsigned long shutter = ((exp->val - exp->minimum) * 1048 + range / 2) / range + 1; dev_dbg(&client->dev, "Setting shutter width from %d to %lu\n", - reg_read(client, MT9M001_SHUTTER_WIDTH), - shutter); + reg_read(client, MT9M001_SHUTTER_WIDTH), shutter); if (reg_write(client, MT9M001_SHUTTER_WIDTH, shutter) < 0) return -EIO; - mt9m001->exposure = ctrl->value; - mt9m001->autoexposure = 0; - } - break; - case V4L2_CID_EXPOSURE_AUTO: - if (ctrl->value) { + } else { const u16 vblank = 25; - unsigned int total_h = mt9m001->rect.height + + + mt9m001->total_h = mt9m001->rect.height + mt9m001->y_skip_top + vblank; - if (reg_write(client, MT9M001_SHUTTER_WIDTH, - total_h) < 0) + if (reg_write(client, MT9M001_SHUTTER_WIDTH, mt9m001->total_h) < 0) return -EIO; - qctrl = soc_camera_find_qctrl(icd->ops, V4L2_CID_EXPOSURE); - mt9m001->exposure = (524 + (total_h - 1) * - (qctrl->maximum - qctrl->minimum)) / - 1048 + qctrl->minimum; - mt9m001->autoexposure = 1; - } else - mt9m001->autoexposure = 0; - break; + } + return 0; } - return 0; + return -EINVAL; } /* @@ -621,10 +541,7 @@ static int mt9m001_video_probe(struct soc_camera_device *icd, dev_err(&client->dev, "Failed to initialise the camera\n"); /* mt9m001_init() has reset the chip, returning registers to defaults */ - mt9m001->gain = 64; - mt9m001->exposure = 255; - - return ret; + return v4l2_ctrl_handler_setup(&mt9m001->hdl); } static void mt9m001_video_remove(struct soc_camera_device *icd) @@ -647,9 +564,12 @@ static int mt9m001_g_skip_top_lines(struct v4l2_subdev *sd, u32 *lines) return 0; } +static const struct v4l2_ctrl_ops mt9m001_ctrl_ops = { + .g_volatile_ctrl = mt9m001_g_volatile_ctrl, + .s_ctrl = mt9m001_s_ctrl, +}; + static struct v4l2_subdev_core_ops mt9m001_subdev_core_ops = { - .g_ctrl = mt9m001_g_ctrl, - .s_ctrl = mt9m001_s_ctrl, .g_chip_ident = mt9m001_g_chip_ident, #ifdef CONFIG_VIDEO_ADV_DEBUG .g_register = mt9m001_g_register, @@ -765,25 +685,40 @@ static int mt9m001_probe(struct i2c_client *client, return -ENOMEM; v4l2_i2c_subdev_init(&mt9m001->subdev, client, &mt9m001_subdev_ops); + v4l2_ctrl_handler_init(&mt9m001->hdl, 4); + v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops, + V4L2_CID_VFLIP, 0, 1, 1, 0); + v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops, + V4L2_CID_GAIN, 0, 127, 1, 64); + mt9m001->exposure = v4l2_ctrl_new_std(&mt9m001->hdl, &mt9m001_ctrl_ops, + V4L2_CID_EXPOSURE, 1, 255, 1, 255); + /* + * Simulated autoexposure. If enabled, we calculate shutter width + * ourselves in the driver based on vertical blanking and frame width + */ + mt9m001->autoexposure = v4l2_ctrl_new_std_menu(&mt9m001->hdl, + &mt9m001_ctrl_ops, V4L2_CID_EXPOSURE_AUTO, 1, 0, + V4L2_EXPOSURE_AUTO); + mt9m001->subdev.ctrl_handler = &mt9m001->hdl; + if (mt9m001->hdl.error) { + int err = mt9m001->hdl.error; - /* Second stage probe - when a capture adapter is there */ - icd->ops = &mt9m001_ops; + kfree(mt9m001); + return err; + } + v4l2_ctrl_auto_cluster(2, &mt9m001->autoexposure, + V4L2_EXPOSURE_MANUAL, true); + /* Second stage probe - when a capture adapter is there */ mt9m001->y_skip_top = 0; mt9m001->rect.left = MT9M001_COLUMN_SKIP; mt9m001->rect.top = MT9M001_ROW_SKIP; mt9m001->rect.width = MT9M001_MAX_WIDTH; mt9m001->rect.height = MT9M001_MAX_HEIGHT; - /* - * Simulated autoexposure. If enabled, we calculate shutter width - * ourselves in the driver based on vertical blanking and frame width - */ - mt9m001->autoexposure = 1; - ret = mt9m001_video_probe(icd, client); if (ret) { - icd->ops = NULL; + v4l2_ctrl_handler_free(&mt9m001->hdl); kfree(mt9m001); } @@ -795,7 +730,8 @@ static int mt9m001_remove(struct i2c_client *client) struct mt9m001 *mt9m001 = to_mt9m001(client); struct soc_camera_device *icd = client->dev.platform_data; - icd->ops = NULL; + v4l2_device_unregister_subdev(&mt9m001->subdev); + v4l2_ctrl_handler_free(&mt9m001->hdl); mt9m001_video_remove(icd); kfree(mt9m001); -- cgit v1.2.3